Net/XMPP2/SimpleConnection.pm

package Net::XMPP2::SimpleConnection;
use IO::Socket::INET;
use Errno;
use Fcntl;
use Encode;
use Net::SSLeay;

BEGIN {
   Net::SSLeay::load_error_strings ();
   Net::SSLeay::SSLeay_add_ssl_algorithms ();
   Net::SSLeay::randomize ();
}

=head1 NAME

Net::XMPP2::SimpleConnection - A low level TCP/TLS connection

=head1 SYNOPSIS

   package foo;
   use Net::XMPP2::SimpleConnection;

   our @ISA = qw/Net::XMPP2::SimpleConnection/;

=head1 DESCRIPTION

This module only implements the basic low level socket and SSL handling stuff.
It is used by L<Net::XMPP2::Connection>.

=cut

sub new {
   my $this = shift;
   my $class = ref($this) || $this;
   my $self = { disconnect_cb => sub {}, @_ };
   bless $self, $class;
   return $self;
}

sub set_block {
   my ($self) = @_;
   my $flags = 0;
   fcntl($self->{socket}, F_GETFL, $flags)
       or die "Couldn't get flags for HANDLE : $!\n";
   $flags &= ~O_NONBLOCK;
   fcntl($self->{socket}, F_SETFL, $flags)
       or die "Couldn't set flags for HANDLE: $!\n";
}

sub set_noblock {
   my ($self) = @_;
   my $flags = 0;
   fcntl($self->{socket}, F_GETFL, $flags)
       or die "Couldn't get flags for HANDLE : $!\n";
   $flags |= O_NONBLOCK;
   fcntl($self->{socket}, F_SETFL, $flags)
       or die "Couldn't set flags for HANDLE: $!\n";
}

sub connect {
   my ($self, $host, $port) = @_;

   $self->{socket}
      and return 1;

   my $sock = IO::Socket::INET->new (
      PeerAddr => $host,
      PeerPort => $port,
      Proto    => 'tcp',
      Blocking => 1
   );
   return undef unless $sock;;

   $self->{socket} = $sock;
   $self->{host}   = $host;
   $self->{port}   = $port;

   $self->set_noblock;

   binmode $sock, ":raw";

   $self->{r} =
      AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
         my $l = sysread $sock, my $data, 1024;

         if ($l) {
            $self->{read_buffer} .= decode_utf8 $data;
            $self->handle_data (\$self->{read_buffer});

         } else {
            return if $! == Errno::EAGAIN;
            if (defined $l) {
               $self->{disconnect_cb}->($self->{host}, $self->{port}, "EOF from server '$self->{host}:$self->{port}'");
               $self->end_sockets;
               return;

            } else {
               $self->{disconnect_cb}->($self->{host}, $self->{port}, "Error while reading from server '$self->{host}:$port': $!");
               $self->end_sockets;
               return;
            }
         }
      });
   return 1;
}

sub end_sockets {
   my ($self) = @_;
   delete $self->{r};
   delete $self->{w};
   delete $self->{socket};
   if (delete $self->{ssl_enabled}) {
      Net::SSLeay::free ($self->{ssl});
      delete $self->{ssl};
      Net::SSLeay::CTX_free ($self->{ctx});
      delete $self->{ctx};
   }
}

sub try_ssl_write {
   my ($self) = @_;

   my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});

   if ($l <= 0) {
      if ($l == 0) {
         $self->{disconnect_cb}->($self->{host}, $self->{port},
            "unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
         $self->end_sockets;
         return;

      } else {
         my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
         if ($err2 == 2 || $err2 == 3) {
            delete $self->{w};
            $self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
            return;
         }

         if ($! != Errno::EAGAIN
             or my $err = Net::SSLeay::ERR_get_error) {

            $self->{disconnect_cb}->($self->{host}, $self->{port},
               sprintf (
                  "Error while writing from server '$self->{host}:$self->{port}': (%d|%s|%s)",
               $err2, (Net::SSLeay::ERR_error_string $err), "$!")
            );
            $self->end_sockets;
            return;
         }
      }
   } else {
      $self->debug_wrote_data (substr $self->{write_buffer}, 0, $l);
      $self->{write_buffer} = substr $self->{write_buffer}, $l;
      if (length ($self->{write_buffer}) <= 0) {
         delete $self->{w};
      }
   }
}

sub try_ssl_read {
   my ($self) = @_;
   my $r = Net::SSLeay::read ($self->{ssl});

   if (defined $r) {
      $self->{read_buffer} .= decode_utf8 ($r);
      $self->handle_data (\$self->{read_buffer});
   } else {
      my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
      if ($err2 == 2 || $err2 == 3) {
         warn "READ RETRY $err2\n";
         delete $self->{r};
         $self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
         return;
      }

      if ($! != Errno::EAGAIN
          or my $err = Net::SSLeay::ERR_get_error) {

         $self->{disconnect_cb}->($self->{host}, $self->{port},
            sprintf (
               "Error while reading from server '$self->{host}:$self->{port}':"
               ."(%d|%s|%s)",
               $err2, (Net::SSLeay::ERR_error_string $err), "$!")
         );
         $self->end_sockets;
         return;
      }
   }
}

sub write_data {
   my ($self, $data) = @_;
   #return unless $self->{r};

   my $cl = $self->{socket};
   $self->{write_buffer} .= encode_utf8 ($data);

   unless ($self->{w}) {
      $self->{w} =
         AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
            if (not $self->{ssl_enabled}) {
               if (my $data = $self->{write_buffer}) {
                  my $len = syswrite $cl, $data;
                  unless ($len) {
                     return if $! == Errno::EAGAIN;
                     if (not defined $len) {
                        warn "error when writing data on $self->{host}:$self->{port}: $!";
                        return;
                     } else {
                        delete $self->{w};
                     }
                  }

                  if ($len == length $self->{write_buffer}) {
                     delete $self->{w};
                  }

                  $self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
                  $self->{write_buffer} = substr $self->{write_buffer}, $len;
               }
            } else {
               $self->try_ssl_write;
            }
         });
   }
}

sub make_ssl_read_watcher {
   my ($self, $poll) = @_;
   return if $self->{r};

   $poll ||= 'r';
   $self->{r} =
      AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
         $self->try_ssl_read;
      });
}

sub make_ssl_write_watcher {
   my ($self, $poll) = @_;
   return if $self->{w};

   $poll ||= 'w';
   $self->{w} =
      AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
         $self->try_ssl_write;
      });
}

sub enable_ssl {
   my ($self) = @_;

   $Net::SSLeay::ssl_version = 10; # Insist on TLSv1

   $self->{ssl_enabled} = 1;

   #d# warn "START TLS!\n";

   $self->{r} = undef;
   $self->{w} = undef;

   $self->{ctx} = Net::SSLeay::CTX_new ();

   # enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
   Net::SSLeay::CTX_set_mode($self->{ctx}, 1 | 2);

   $self->{ssl} = Net::SSLeay::new ($self->{ctx});

   Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
   #d# warn "CONNECT\n";
   Net::SSLeay::connect $self->{ssl};
   #d# warn "CONNECT END\n";
   binmode $self->{socket}, ":bytes";

   $self->{ssl_read_data} = "";
   $self->make_ssl_read_watcher;
}

1;
Revision:	1.4
Committed:	Sat Apr 21 13:51:39 2007 UTC (19 years, 6 months ago) by elmex
Branch:	MAIN
Changes since 1.3:	+3 -3 lines
Log Message:	implemented the (hopefully) last bits of important error reporting. Net::XMPP was released at the beginngin of this month - damn, i was too slow. But i've taken a look at their code. 17000 lines of code vs. my ~4500 LoC. Also their Java-API is really a mess...
#	Content
1	package Net::XMPP2::SimpleConnection;
2	use IO::Socket::INET;
3	use Errno;
4	use Fcntl;
5	use Encode;
6	use Net::SSLeay;
7
8	BEGIN {
9	Net::SSLeay::load_error_strings ();
10	Net::SSLeay::SSLeay_add_ssl_algorithms ();
11	Net::SSLeay::randomize ();
12	}
13
14	=head1 NAME
15
16	Net::XMPP2::SimpleConnection - A low level TCP/TLS connection
17
18	=head1 SYNOPSIS
19
20	package foo;
21	use Net::XMPP2::SimpleConnection;
22
23	our @ISA = qw/Net::XMPP2::SimpleConnection/;
24
25	=head1 DESCRIPTION
26
27	This module only implements the basic low level socket and SSL handling stuff.
28	It is used by L<Net::XMPP2::Connection>.
29
30	=cut
31
32	sub new {
33	my $this = shift;
34	my $class = ref($this) \|\| $this;
35	my $self = { disconnect_cb => sub {}, @_ };
36	bless $self, $class;
37	return $self;
38	}
39
40	sub set_block {
41	my ($self) = @_;
42	my $flags = 0;
43	fcntl($self->{socket}, F_GETFL, $flags)
44	or die "Couldn't get flags for HANDLE : $!\n";
45	$flags &= ~O_NONBLOCK;
46	fcntl($self->{socket}, F_SETFL, $flags)
47	or die "Couldn't set flags for HANDLE: $!\n";
48	}
49
50	sub set_noblock {
51	my ($self) = @_;
52	my $flags = 0;
53	fcntl($self->{socket}, F_GETFL, $flags)
54	or die "Couldn't get flags for HANDLE : $!\n";
55	$flags \|= O_NONBLOCK;
56	fcntl($self->{socket}, F_SETFL, $flags)
57	or die "Couldn't set flags for HANDLE: $!\n";
58	}
59
60	sub connect {
61	my ($self, $host, $port) = @_;
62
63	$self->{socket}
64	and return 1;
65
66	my $sock = IO::Socket::INET->new (
67	PeerAddr => $host,
68	PeerPort => $port,
69	Proto => 'tcp',
70	Blocking => 1
71	);
72	return undef unless $sock;;
73
74	$self->{socket} = $sock;
75	$self->{host} = $host;
76	$self->{port} = $port;
77
78	$self->set_noblock;
79
80	binmode $sock, ":raw";
81
82	$self->{r} =
83	AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
84	my $l = sysread $sock, my $data, 1024;
85
86	if ($l) {
87	$self->{read_buffer} .= decode_utf8 $data;
88	$self->handle_data (\$self->{read_buffer});
89
90	} else {
91	return if $! == Errno::EAGAIN;
92	if (defined $l) {
93	$self->{disconnect_cb}->($self->{host}, $self->{port}, "EOF from server '$self->{host}:$self->{port}'");
94	$self->end_sockets;
95	return;
96
97	} else {
98	$self->{disconnect_cb}->($self->{host}, $self->{port}, "Error while reading from server '$self->{host}:$port': $!");
99	$self->end_sockets;
100	return;
101	}
102	}
103	});
104	return 1;
105	}
106
107	sub end_sockets {
108	my ($self) = @_;
109	delete $self->{r};
110	delete $self->{w};
111	delete $self->{socket};
112	if (delete $self->{ssl_enabled}) {
113	Net::SSLeay::free ($self->{ssl});
114	delete $self->{ssl};
115	Net::SSLeay::CTX_free ($self->{ctx});
116	delete $self->{ctx};
117	}
118	}
119
120	sub try_ssl_write {
121	my ($self) = @_;
122
123	my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});
124
125	if ($l <= 0) {
126	if ($l == 0) {
127	$self->{disconnect_cb}->($self->{host}, $self->{port},
128	"unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
129	$self->end_sockets;
130	return;
131
132	} else {
133	my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
134	if ($err2 == 2 \|\| $err2 == 3) {
135	delete $self->{w};
136	$self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
137	return;
138	}
139
140	if ($! != Errno::EAGAIN
141	or my $err = Net::SSLeay::ERR_get_error) {
142
143	$self->{disconnect_cb}->($self->{host}, $self->{port},
144	sprintf (
145	"Error while writing from server '$self->{host}:$self->{port}': (%d\|%s\|%s)",
146	$err2, (Net::SSLeay::ERR_error_string $err), "$!")
147	);
148	$self->end_sockets;
149	return;
150	}
151	}
152	} else {
153	$self->debug_wrote_data (substr $self->{write_buffer}, 0, $l);
154	$self->{write_buffer} = substr $self->{write_buffer}, $l;
155	if (length ($self->{write_buffer}) <= 0) {
156	delete $self->{w};
157	}
158	}
159	}
160
161	sub try_ssl_read {
162	my ($self) = @_;
163	my $r = Net::SSLeay::read ($self->{ssl});
164
165	if (defined $r) {
166	$self->{read_buffer} .= decode_utf8 ($r);
167	$self->handle_data (\$self->{read_buffer});
168	} else {
169	my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
170	if ($err2 == 2 \|\| $err2 == 3) {
171	warn "READ RETRY $err2\n";
172	delete $self->{r};
173	$self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
174	return;
175	}
176
177	if ($! != Errno::EAGAIN
178	or my $err = Net::SSLeay::ERR_get_error) {
179
180	$self->{disconnect_cb}->($self->{host}, $self->{port},
181	sprintf (
182	"Error while reading from server '$self->{host}:$self->{port}':"
183	."(%d\|%s\|%s)",
184	$err2, (Net::SSLeay::ERR_error_string $err), "$!")
185	);
186	$self->end_sockets;
187	return;
188	}
189	}
190	}
191
192	sub write_data {
193	my ($self, $data) = @_;
194	#return unless $self->{r};
195
196	my $cl = $self->{socket};
197	$self->{write_buffer} .= encode_utf8 ($data);
198
199	unless ($self->{w}) {
200	$self->{w} =
201	AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
202	if (not $self->{ssl_enabled}) {
203	if (my $data = $self->{write_buffer}) {
204	my $len = syswrite $cl, $data;
205	unless ($len) {
206	return if $! == Errno::EAGAIN;
207	if (not defined $len) {
208	warn "error when writing data on $self->{host}:$self->{port}: $!";
209	return;
210	} else {
211	delete $self->{w};
212	}
213	}
214
215	if ($len == length $self->{write_buffer}) {
216	delete $self->{w};
217	}
218
219	$self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
220	$self->{write_buffer} = substr $self->{write_buffer}, $len;
221	}
222	} else {
223	$self->try_ssl_write;
224	}
225	});
226	}
227	}
228
229	sub make_ssl_read_watcher {
230	my ($self, $poll) = @_;
231	return if $self->{r};
232
233	$poll \|\|= 'r';
234	$self->{r} =
235	AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
236	$self->try_ssl_read;
237	});
238	}
239
240	sub make_ssl_write_watcher {
241	my ($self, $poll) = @_;
242	return if $self->{w};
243
244	$poll \|\|= 'w';
245	$self->{w} =
246	AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
247	$self->try_ssl_write;
248	});
249	}
250
251	sub enable_ssl {
252	my ($self) = @_;
253
254	$Net::SSLeay::ssl_version = 10; # Insist on TLSv1
255
256	$self->{ssl_enabled} = 1;
257
258	#d# warn "START TLS!\n";
259
260	$self->{r} = undef;
261	$self->{w} = undef;
262
263	$self->{ctx} = Net::SSLeay::CTX_new ();
264
265	# enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
266	Net::SSLeay::CTX_set_mode($self->{ctx}, 1 \| 2);
267
268	$self->{ssl} = Net::SSLeay::new ($self->{ctx});
269
270	Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
271	#d# warn "CONNECT\n";
272	Net::SSLeay::connect $self->{ssl};
273	#d# warn "CONNECT END\n";
274	binmode $self->{socket}, ":bytes";
275
276	$self->{ssl_read_data} = "";
277	$self->make_ssl_read_watcher;
278	}
279
280	1;